<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>流体布局</title>
	<!-- meta:vp设置视口，就不会被等比压缩 -->
	<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
	<style type="text/css">
		body{
			margin: 0;	
		}

		.header{
			height: 50px;
			background-color: gold;
			text-align: center;
			line-height: 50px;
			font-size: 30px;
		}
	</style>
</head>
<body>
	<div class="header">页面头部</div>
</body>
</html>